Ching-Sung Lee, B. Chou, W. Hsu, S. Chu, D. Lin, C. Ho, Y. Lai, Shen-Han Yang, W. Chien
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Optical Sensing Characteristics in a Transparent Al-Doped Zinc Oxide-Gated Al0.2Ga0.8As/In0.2Ga0.8As High Electron Mobility Transistor
A three-terminal optical sensor by using an aluminum-doped zinc oxide (AZO)-gated Al0.2Ga0.8As /In0.2Ga0.8As high electron mobility transistor (AZO-HEMT) on a GaAs substrate is demonstrated in this report. Optical responses under illumination of different wavelengths are investigated, as compared to a conventional Au-gated HEMT device. Experimental results demonstrate that the present design is promising for tunable optical sensing applications.